Copy Method

The copy() method assumes that both arrays are the same size. If not, the program will not work correctly. A better written method would include error checking.

// Array Example
//
class ChangeArray
{
  void print ( int[] x )
  {
    for (int j=0; j < x.length; j++)
      System.out.print( x[j] + " " );
    System.out.println( );
  }

  // Copy source to target
  void copy (int[] source, int[] target)
  {    
    for (int count=0; count<source.length; count++)
      target[ count ] = source[ count ]; 
  }
}

class ChangeTest
{
  public static void main(String[] args)
  {
    ChangeArray cng = new ChangeArray();
    int[] s = {27, 19, 34, 5, 12} ;
    int[] t = new int[ s.length ];
    
    cng.copy( s, t );
    System.out.println( "After copy:" );
    cng.print( t );
  }
}

QUESTION 14:

Here is another version of the copy() method. Is this version correct?

  // Copy source to target
  void copy ( int[] source, int[] target )
  {
    target = source ;
  }